Author:
PlayboyPrime

Language:
C/C++

Upload:
1:12 AM 08/23/2025

Platform
Windows

Difficulty:
4.0

Quality:
4.0

Arch:
x86-64

Description

It asks you to input a password. If its wrong it says "Wrong Password!" if its correct it says "Correct Password!". The binary is obfuscated. There is no anti debug so you can just step through if you want.

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karabatik on 3:10 PM 08/23/2025: I stopped the binary right after its decode stub by planting an INT3 at RVA 0x92F00, dumped the entire in-memory image, opened the dump in Binary Ninja, and followed the actual control flow start → sub_7ff63656F40B → sub_7ff636592F00; Under a flag-driven, pushf/popf-based control flow flattening, I identified the actual password check in sub_7ff6365542a1, which reads certain indices from the input buffer via sub_7ff6365778c4(&buf, idx) and compares them to movsx/cmp imm8 literals in the order '2', '3', 's', '2', 'N', 'o', 'R', 't', 'e'; using x64dbg with ReadFile/WriteFile breakpoints, I traced the input and branch results to confirm the success path matches these comparisons; resulting password: 23s2NoRte.

PlayboyPrime on 4:48 PM 08/23/2025: Nice. I'll upload a harder version soon 😂

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